Retrofit学习(一)集成-简单get请求

github https: github com square retrofit 在studio在添加依赖 添加retrofit-会自动下载okhttpcompile & 039;com squareup re

github https://github.com/square/retrofit

在studio在添加依赖

 //添加retrofit-会自动下载okhttpcompile 'com.squareup.retrofit2:retrofit:2.1.0' //添加retrofit gson转换会自动下载gsoncompile 'com.squareup.retrofit2:converter-gson:2.1.0' //添加返回的字符串支付compile 'com.squareup.retrofit2:converter-scalars:2.1.0'

可以用其它的retrofit2支付的替代见连接

转换可以在API处找到

http://square.github.io/retrofit/#api-declaration

右侧点击Retrofit Configuration版本与retrofit2保持一直即可

Gson: com.squareup.retrofit2:converter-gsonJackson: com.squareup.retrofit2:converter-jacksonMoshi: com.squareup.retrofit2:converter-moshiProtobuf: com.squareup.retrofit2:converter-protobufWire: com.squareup.retrofit2:converter-wireSimple XML: com.squareup.retrofit2:converter-simplexmlScalars (primitives, boxed, and String): com.squareup.retrofit2:converter-scalars

第一个get请求

添加网络权限

<uses-permission android:name="android.permission.INTERNET"/>

建立接口

public interface GitHubService { @GET("users/{user}/repos") Call<String> listRepos(@Path("user") String user);}

简单说明一下

@GET表示为get请求,还会有@POST

@PATH 表示后面的参数要添加到@GETR后面对应的{user}中,{user}相当于一个占位符

学习spring MVC都知道这种做学法把请求参数添加到请求路径中去,

@Query就是我们的请求的键值对的设置

@QueryMap 和@Query相似 就是个传个map集合,也是键值对

开始请求

界面就一个按键点击可以请求

结果

OK [{"id":18221276,"name":"git-consortium","full_name":"octocat/git-consortium","owner":{"login":"octocat","id":583231,"avatar_url":"https://avatars.githubusercontent.com/u/583231?v=3","gravatar_id":"","url":"https://api.github.com/users/octocat","html_url":"https://github.com/octocat","followers_url":"https://api.github.com/users/octocat/followers","following_url":"https://api.github.com/users/octocat/following{/other_user}","gists_url":"https://api.github.com/users/octocat/gists{/gist_id}","starred_url":"https://api.github.com/users/octocat/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/octocat/subscriptions","organizations_url":"https://api.github.com/users/octocat/orgs","repos_url":"https://api.github.com/users/octocat/repos","events_url":"https://api.github.com/users/octocat/events{/privacy}","received_events_url":"https://api.github.com/users/octocat/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/octocat/git-consortium","description":"This repo is for demonstration purposes only.","fork":false,"url":"https://api.github.com/repos/octocat/git-consortium","forks_url":"https://api.github.com/repos/octocat/git-consortium/forks","keys_url":"https://api.github.com/repos/octocat/git-consortium/keys{/key_id}","collaborators_url":"https://api.github.com/repos/octocat/git-consortium/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/octocat/git-consortium/teams","hooks_url":"https://api.github.com/repos/octocat/git-consortium/hooks","issue_events_url":"https://api.github.com/repos/octocat/git-consortium/issues/events{/number}","events_url":"https://api.github.com/repos/octocat/git-consortium/events","assignees_url":"https://api.github.com/repos/octocat/git-consortium/assignees{/user}","branches_url":"https://api.github.com/repos/octocat/git-consortium/branches{/branch}","tags_url":"https://api.github.com/repos/octocat/git-consortium/tags","blobs_url":"https://api.github.com/repos/octocat/git-consortium/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/octocat/git-consortium/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/octocat/git-consortium/git/refs{/sha}","trees_url":"https://api.github.com/repos/octocat/git-consortium/git/trees{/sha}","statuses_url":"https://api.github.com/repos/octocat/git-consortium/statuses/{sha}","languages_url":"https://api.github.com/repos/octocat/git-consortium/languages","stargazers_url":"https://api.github.com/repos/octocat/git-consortium/stargazers","contributors_url":"https://api.github.com/repos/octocat/git-consortium/contributors","subscribers_url":"https://api.github.com/repos/octocat/git-consortium/subscribers","subscription_url":"https://api.github.com/repos/octocat/git-consortium/subscription","commits_url":"https://api.github.com/repos/octocat/git-consortium/commits{/sha}","git_commits_url":"https://api.github.com/repos/octocat/git-consortium/git/commits{/sha}","comments_url":"https://api.github.com/repos/octocat/git-consortium/comments{/number}","issue_comment_url":"https://api.github.com/repos/octocat/git-consortium/issues/comments{/number}","contents_url":"https://api.github.com/repos/octocat/git-consortium/contents/{+path}","compare_url":"https://api.github.com/repos/octocat/git-consortium/compare/{base}...{head}","merges_url":"https://api.github.com/repos/octocat/git-consortium/merges","archive_url":"https://api.github.com/repos/octocat/git-consortium/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/octocat/git-consortium/downloads","issues_url":"https://api.github.com/repos/octocat/git-consortium/issues{/number}","pulls_url":"https://api.github.com/repos/octocat/git-consortium/pulls{/number}","milestones_url":"https://api.github.com/repos/octocat/git-consortium/milestones{/number}","notifications_url":"https://api.github.com/repos/octocat/git-consortium/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/octocat/git-consortium/labels{/name}","releases_url":"https://api.github.com

这样一个网络请求就完成了

把返回字符串返回实体类使用Gson

package com.liu.retrofitdemo2.bean;import com.google.gson.annotations.SerializedName;/** * @Description: 描述 * @AUTHOR 刘楠 Create By 2016/10/26 0026 10:54 */public class Repo { public int id; public String name; public String full_name; public OwnerEntity owner; @SerializedName("private") public boolean privateX; public String html_url; public Object description; public boolean fork; public String url; public String forks_url; public String keys_url; public String collaborators_url; public String teams_url; public String hooks_url; public String issue_events_url; public String events_url; public String assignees_url; public String branches_url; public String tags_url; public String blobs_url; public String git_tags_url; public String git_refs_url; public String trees_url; public String statuses_url; public String languages_url; public String stargazers_url; public String contributors_url; public String subscribers_url; public String subscription_url; public String commits_url; public String git_commits_url; public String comments_url; public String issue_comment_url; public String contents_url; public String compare_url; public String merges_url; public String archive_url; public String downloads_url; public String issues_url; public String pulls_url; public String milestones_url; public String notifications_url; public String labels_url; public String releases_url; public String deployments_url; public String created_at; public String updated_at; public String pushed_at; public String git_url; public String ssh_url; public String clone_url; public String svn_url; public Object homepage; public int size; public int stargazers_count; public int watchers_count; public String language; public boolean has_issues; public boolean has_downloads; public boolean has_wiki; public boolean has_pages; public int forks_count; public Object mirror_url; public int open_issues_count; public int forks; public int open_issues; public int watchers; public String default_branch; public static class OwnerEntity { public String login; public int id; public String avatar_url; public String gravatar_id; public String url; public String html_url; public String followers_url; public String following_url; public String gists_url; public String starred_url; public String subscriptions_url; public String organizations_url; public String repos_url; public String events_url; public String received_events_url; public String type; public boolean site_admin; }}

记得添加toString方法方法查看

更改接口返回值

public interface GitHubService { @GET("users/{user}/repos") Call<List<Repo>> listRepos(@Path("user") String user);}

再次请求

 //建立retrofit对象 Retrofit retrofit = new Retrofit.Builder().baseUrl("https://api.github.com/") //添加返回字符串的支持--不知道返回的是什么,添加字符串支持 .addConverterFactory(ScalarsConverterFactory.create()) //添加GSON转换支持 .addConverterFactory(GsonConverterFactory.create()) .build(); //获取接口 GitHubService service = retrofit.create(GitHubService.class); //调用方法-返回 回调更换为对象 Call<List<Repo>> call = service.listRepos("octocat"); //异步调用 call.enqueue(new Callback<List<Repo>>() { @Override public void onResponse(Call<List<Repo>> call, Response<List<Repo>> response) { L.d("vivi",response.message()+" "+response.body()); mTvResult.setText(response.message()+" /n结果: "+response.body().toString()); Toast.makeText(FirstActivity.this, "结果:/n "+response.body().toString(), Toast.LENGTH_SHORT).show(); } @Override public void onFailure(Call<List<Repo>> call, Throwable t) { t.printStackTrace(); mTvResult.setText(t.getMessage()); } });}

Retrofit学习(一)集成-简单get请求

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